Automatic stokeb



Feb. 3, 1931. w E T NER 1,790,885

AUTOMATIC STOKER Filed June 1, 1928 2 Sheets-Sheet l NVENTOR,

.BY W

A TT ORNE Y Feb. 3, 1931. w E TURNER 1,790,885

AUTOMATIC STOKER I Filed June 1, 1.928 2 Sheds-Sheet 2 31 vs 0 55 a 1516 66 o o 5 20 12 Q3 2 I 46 I4 A TTORNEY Patented Feb. 3, 1931 UNITEDSTATES PATENT; OFFICE WALTER E. TURNER, PIQUA, OHIO, ASSIGNOB, BY MESNEASSIGNMENTS, TO THE CLEVELAND STOKEB. COMPANY, OF CLEVELAND, OHIOAUTOMATIC STOKER Applicationflled June '1, 1928. Serial No. 282,115.

This invention relates to new and useful improvements in automaticstokers.

It is one of the principal objects of my invention to provide aneconomical and eflicient automatic stoker in which the movable andstationary grates have a common, central bearing below the grate line.The bearing is compact and self contained, and has no support other thanthe retort from which it depends.

It is another object of my invention to provide a movable grate throughwhich the fire ashes will constantly sift and which wil keep the firebright at all times.

Other important and incidental objects will be brought out in thefollowing specification and particularly set forth in the subjoinedclaims.

In the accompanying drawings illustrating my invention, Fi re 1 is a topplan view of my automatic sto er, showing the grate bars. Figure 2 is alongitudinal sectional view taken through the stoker on theline 2-2 ofFigure 1. Figure 3 is a bottom plan view of the stoker. And Fi re 4 is across sectional view taken through the drive mechanism on the line 44 ofFigure 2.

Referring to the accompanying drawings for a detailed description of myinvention,

the numeral 1 designated a hopper for use J ournaled in in connectionwith the same. a gear casin 2 integral with the hopper 1 is a drive shat 3 connected to a motor, not shown. Fast on this shaft 3 is a worm gear4 that meshes with a gear 5 fixedly secured to a vertical shaft 6journaled in the casing 2.

Fast on the shaft 6 is a worm 7 which engages a gear 8 on a horizontalshaft 9 journaled in hearings in the casing 2.

The shaft 9 is connected to and supports one end of a screw conveyorshaft 10 which is rotatable in the bottom of the hopper 1. Secured tothis shaft is a spiral blade or screw 11 for moving the green coal intoa retort 12. The latter is secured to the inner end of the conveyor tube13, which is attached to the hopper 1. (See Figures 1 and 2.)

The retort 12 is elbow shaped, with an open flanged top 14 to deliverthe coal into the center of the bowl of a warm air furnace (not shown).Formed on the curved portion of the bottom of the retort casting 12 is16 above a piece 17 resting upon a cross pin- 18, is a metal block 19formed at its top portion with a flange 20. Secured to the latter by'bolts 21 are upwardly curved arms 22 formed with horizontal fiat ends23. Attached to these ends 23 by bolts 24 is a segmental ring 25 whichsupports the radial bars 26 of a stationary grate 27. Pivotally mountedon the pin 16 between the block 19 and the boss 15 is the hub portion 28of amovable spider 29. The curved arms of this spider terminate at theirupper ends in horizontal cars 30 to which a segmental ring 31 formedwith radial grate bars 32 is secured. (See Figures 1 and 3.)

Secured to the under surface of the flange 14 on the top of the retortcasting 12 is a. fixed Referring to Figures land 2, there projectsinwardly from the hopper casing 1 a ledge 36 in which there is journaleda vertical shaft 37 upon the lower end of which a bevel gear 38 is fast.This gear 38 is in mesh with a bevel gear 39 fast on a horizontal shaft40 journaled in the hopper 1 and projecting through its extension 2.(See Figure 2.)

For the purpose of rotating the shaft 40, there is secured to its outerend within the casing 2, a gear 41 which meshes with a gear 42 fast onthe shaft 9 that is driven by the means hereinbefore described. Fast onthe upper end of the shaft 37 is a disc 43 to which there is pivotallysecured by a pin 44, one end of a shaker rod 45. At its other end therod 45 is pivotally connected by a pin 46 to one end of the ring 31 ofthe movable grate. Therefore, when the conveyor shaft 10 is rotated tomove the green coal into the it and to keep the fire bright while theStoker is in operation.

During the operation of the stoker, the movable and the stationary gratesupport is at all times under the fire line. Such central bearingprovided by the pin 16 and associated parts, is compact and selfcontained, being independent of any other support. I

Having described my invention, I claim:

1. In an automatic stoker, a retort, means for mechanically deliveringcoal to said retort, a movable grate associated with said retort, and apivot bearing for said movable grate, depending from the bottom of theretort.

2. In an automatic stoker, a retort, means for mechanically deliveringcoal to said retort, astationary grate and a movable grate associatedwith said retort, and a central support depending from the retort forthe stationary and the movable grates.

3. In an automatic stoker, a retort, means for mechanically deliveringcoal to said retort, a stationary grate partially surrounding saidretort, a movable grate of less diameter than the stationary grate, alsopartially surrounding said retort, and a central support for saidgrates, depending from the bottom of said retort.

4;. In an automatic stoker, a retort, means for mechanically deliveringcoal to said retort, a stat-iona grate and a movable grate associatedwith zaid retort, a pivot pin depending from the bottom of said retort,a spider connected to said pin for supporting the stationary grate, anda spider pivotally mounted on said pin for connection to the S movablegrate.

5. In an automatic stoker, a retort, means for mechanically deliveringcoal to said retort, a boss formed on the bottom of said retort, a pinprojecting downwardly from said boss, a block fixed on the lower end ofthe pin, arms projecting upwardly from said block, astationary segmentalgrate secured to the upper portions of said arms, a hub loosely mountedon said pin above the block, arms projecting upwardly from said hub, anda movable grate secured to the upper portion of said arms.

In witness whereof I have hereunto set my hand this 25th day of May,1928.

- WALTER E. TURNER.

